ORIGINAL: jdb000001

Do you have a voltmeter? If so, measure the voltage at the battery connector to make sure the battery polarity is correct, then measure the voltage off the BEC to see if you are getting power to the receiver.

You may have to lower the trim on the throttle to get the ESC to arm - sometimes low throttle is just not low enough. Not sure about the RD6000, but on my Futaba radio, the throttle trim only works at one end of the throttle travel - it is programmable to be at either the top or bottom of the stick movement.

Are you using a Century brand crystal in the receiver? Using the wrong brand crystal may not work.

Doesn't look like the RD6000 will do PCM, so should not be a problem with that being set wrong.

Since you smelled something burning, you probably have at least one component that is not going to work (by Murphy's law, it will be the most expensive, and hardest to replace).

If nothing else, try plugging just the tail rotor ESC into the throttle channel, and see if that will work - will at least tell you that the receiver works. The ICS50 may not be able to handle the 11.1V LiPO - its rated for 5-8 Nicads.